ZBrushCentral

Ugly Normal Map! (please help)

ZBrush Usage Questions
#1

Hello everyone,

I am having some strange issues with my normal map. Any help in what direction I need to head in order to clean it up would be greatly appriciated :slight_smile: The main problems seem to be odd stretching of the detail, the detail not applying in the corect spot or being off-center, and random dark spots occur throughout the model. I have attached some pictures which show the zbrush sculpt and the normal map on a low-poly model. I intend to use this model for a game, so will not be using a displacement map. If anyone would like to take a look at the actual maya file please PM me and I will send it to you.

Thank you very much for any help you can provide.

  1. The high res zbrush sculpt (viewport screenshot).
    highres.jpg

Thanks!
~Kalifei

Attachments

LowPoly_normalMap.jpg

Ugly_Face.jpg

UVs.jpg

#2

Well, you didn’t provide any info for your steps or your settings when creating the normal map. That makes it hard to help troubleshoot.

One thing I can say is that your UV’s are not at all ideal for Tangent maps. The math behind those maps forces flipping whenever you cross a UV seam. Your mapping puts those seams in places where that flipping is very obvious. You should either remap the model to hide the seams or use Object mapping instead.

Alternatively, you could try this: http://www.zbrushcentral.com/zbc/showthread.php?t=56882